/
githubmirror
/
zstd
Обзор
Документация
Войти
/
githubmirror
/
zstd
Код
Запросы
0
Пакеты
0
Релизы
0
Аналитика
Безопасность
v1.4.0
programs/fileio.c
2 538 строк
99 KB
Josh Soref
Spelling (#1582)
12 апр 2019, 21:18
12 апр 2019, 21:18
a880ca2
Код
Авторство
О чём код?
/* * Copyright (c) 2016-present, Yann Collet, Facebook, Inc. * All rights reserved. * * This source code is licensed under both the BSD-style license (found in the * LICENSE file in the root directory of this source tree) and the GPLv2 (found * in the COPYING file in the root directory of this source tree). * You may select, at your option, one of the above-listed licenses. */ /* ************************************* * Compiler Options ***************************************/ #ifdef _MSC_VER /* Visual */ # pragma warning(disable : 4127) /* disable: C4127: conditional expression is constant */ # pragma warning(disable : 4204) /* non-constant aggregate initializer */ #endif #if defined(__MINGW32__) && !defined(_POSIX_SOURCE) # define _POSIX_SOURCE 1 /* disable %llu warnings with MinGW on Windows */ #endif /*-************************************* * Includes ***************************************/ #include "platform.h" /* Large Files support, SET_BINARY_MODE */ #include "util.h" /* UTIL_getFileSize, UTIL_isRegularFile, UTIL_isSameFile */ #include <stdio.h> /* fprintf, fopen, fread, _fileno, stdin, stdout */ #include <stdlib.h> /* malloc, free */ #include <string.h> /* strcmp, strlen */ #include <assert.h> #include <errno.h> /* errno */ #include <signal.h> #include "timefn.h" /* UTIL_getTime, UTIL_clockSpanMicro */ #if defined (_MSC_VER) # include <sys/stat.h> # include <io.h> #endif #include "mem.h" /* U32, U64 */ #include "fileio.h" #define ZSTD_STATIC_LINKING_ONLY /* ZSTD_magicNumber, ZSTD_frameHeaderSize_max */ #include "zstd.h" #include "zstd_errors.h" /* ZSTD_error_frameParameter_windowTooLarge */ #if defined(ZSTD_GZCOMPRESS) || defined(ZSTD_GZDECOMPRESS) # include <zlib.h> # if !defined(z_const) # define z_const # endif #endif #if defined(ZSTD_LZMACOMPRESS) || defined(ZSTD_LZMADECOMPRESS) # include <lzma.h> #endif #define LZ4_MAGICNUMBER 0x184D2204 #if defined(ZSTD_LZ4COMPRESS) || defined(ZSTD_LZ4DECOMPRESS) # define LZ4F_ENABLE_OBSOLETE_ENUMS # include <lz4frame.h> # include <lz4.h> #endif /*-************************************* * Constants ***************************************/ #define KB *(1<<10) #define MB *(1<<20) #define GB *(1U<<30) #define ADAPT_WINDOWLOG_DEFAULT 23 /* 8 MB */ #define DICTSIZE_MAX (32 MB) /* protection against large input (attack scenario) */ #define FNSPACE 30 /*-************************************* * Macros ***************************************/ struct FIO_display_prefs_s { int displayLevel; /* 0 : no display; 1: errors; 2: + result + interaction + warnings; 3: + progression; 4: + information */ U32 noProgress; }; static FIO_display_prefs_t g_display_prefs = {2, 0}; #define DISPLAY(...) fprintf(stderr, __VA_ARGS__) #define DISPLAYOUT(...) fprintf(stdout, __VA_ARGS__) #define DISPLAYLEVEL(l, ...) { if (g_display_prefs.displayLevel>=l) { DISPLAY(__VA_ARGS__); } } static const U64 g_refreshRate = SEC_TO_MICRO / 6; static UTIL_time_t g_displayClock = UTIL_TIME_INITIALIZER; #define READY_FOR_UPDATE() (!g_display_prefs.noProgress && UTIL_clockSpanMicro(g_displayClock) > g_refreshRate) #define DELAY_NEXT_UPDATE() { g_displayClock = UTIL_getTime(); } #define DISPLAYUPDATE(l, ...) { \ if (g_display_prefs.displayLevel>=l && !g_display_prefs.noProgress) { \ if (READY_FOR_UPDATE() || (g_display_prefs.displayLevel>=4)) { \ DELAY_NEXT_UPDATE(); \ DISPLAY(__VA_ARGS__); \ if (g_display_prefs.displayLevel>=4) fflush(stderr); \ } } } #undef MIN /* in case it would be already defined */ #define MIN(a,b) ((a) < (b) ? (a) : (b)) #define EXM_THROW(error, ...) \ { \ DISPLAYLEVEL(1, "zstd: "); \ DISPLAYLEVEL(5, "Error defined at %s, line %i : \n", __FILE__, __LINE__); \ DISPLAYLEVEL(1, "error %i : ", error); \ DISPLAYLEVEL(1, __VA_ARGS__); \ DISPLAYLEVEL(1, " \n"); \ exit(error); \ } #define CHECK_V(v, f) \ v = f; \ if (ZSTD_isError(v)) { \ DISPLAYLEVEL(5, "%s \n", #f); \ EXM_THROW(11, "%s", ZSTD_getErrorName(v)); \ } #define CHECK(f) { size_t err; CHECK_V(err, f); } /*-************************************ * Signal (Ctrl-C trapping) **************************************/ static const char* g_artefact = NULL; static void INThandler(int sig) { assert(sig==SIGINT); (void)sig; #if !defined(_MSC_VER) signal(sig, SIG_IGN); /* this invocation generates a buggy warning in Visual Studio */ #endif if (g_artefact) { assert(UTIL_isRegularFile(g_artefact)); remove(g_artefact); } DISPLAY("\n"); exit(2); } static void addHandler(char const* dstFileName) { if (UTIL_isRegularFile(dstFileName)) { g_artefact = dstFileName; signal(SIGINT, INThandler); } else { g_artefact = NULL; } } /* Idempotent */ static void clearHandler(void) { if (g_artefact) signal(SIGINT, SIG_DFL); g_artefact = NULL; } /*-********************************************************* * Termination signal trapping (Print debug stack trace) ***********************************************************/ #if defined(__has_feature) && !defined(BACKTRACE_ENABLE) /* Clang compiler */ # if (__has_feature(address_sanitizer)) # define BACKTRACE_ENABLE 0 # endif /* __has_feature(address_sanitizer) */ #elif defined(__SANITIZE_ADDRESS__) && !defined(BACKTRACE_ENABLE) /* GCC compiler */ # define BACKTRACE_ENABLE 0 #endif #if !defined(BACKTRACE_ENABLE) /* automatic detector : backtrace enabled by default on linux+glibc and osx */ # if (defined(__linux__) && defined(__GLIBC__)) \ || (defined(__APPLE__) && defined(__MACH__)) # define BACKTRACE_ENABLE 1 # else # define BACKTRACE_ENABLE 0 # endif #endif /* note : after this point, BACKTRACE_ENABLE is necessarily defined */ #if BACKTRACE_ENABLE #include <execinfo.h> /* backtrace, backtrace_symbols */ #define MAX_STACK_FRAMES 50 static void ABRThandler(int sig) { const char* name; void* addrlist[MAX_STACK_FRAMES]; char** symbollist; int addrlen, i; switch (sig) { case SIGABRT: name = "SIGABRT"; break; case SIGFPE: name = "SIGFPE"; break; case SIGILL: name = "SIGILL"; break; case SIGINT: name = "SIGINT"; break; case SIGSEGV: name = "SIGSEGV"; break; default: name = "UNKNOWN"; } DISPLAY("Caught %s signal, printing stack:\n", name); /* Retrieve current stack addresses. */ addrlen = backtrace(addrlist, MAX_STACK_FRAMES); if (addrlen == 0) { DISPLAY("\n"); return; } /* Create readable strings to each frame. */ symbollist = backtrace_symbols(addrlist, addrlen); /* Print the stack trace, excluding calls handling the signal. */ for (i = ZSTD_START_SYMBOLLIST_FRAME; i < addrlen; i++) { DISPLAY("%s\n", symbollist[i]); } free(symbollist); /* Reset and raise the signal so default handler runs. */ signal(sig, SIG_DFL); raise(sig); } #endif void FIO_addAbortHandler() { #if BACKTRACE_ENABLE signal(SIGABRT, ABRThandler); signal(SIGFPE, ABRThandler); signal(SIGILL, ABRThandler); signal(SIGSEGV, ABRThandler); signal(SIGBUS, ABRThandler); #endif } /*-************************************************************ * Avoid fseek()'s 2GiB barrier with MSVC, macOS, *BSD, MinGW ***************************************************************/ #if defined(_MSC_VER) && _MSC_VER >= 1400 # define LONG_SEEK _fseeki64 # define LONG_TELL _ftelli64 #elif !defined(__64BIT__) && (PLATFORM_POSIX_VERSION >= 200112L) /* No point defining Large file for 64 bit */ # define LONG_SEEK fseeko # define LONG_TELL ftello #elif defined(__MINGW32__) && !defined(__STRICT_ANSI__) && !defined(__NO_MINGW_LFS) && defined(__MSVCRT__) # define LONG_SEEK fseeko64 # define LONG_TELL ftello64 #elif defined(_WIN32) && !defined(__DJGPP__) # include <windows.h> static int LONG_SEEK(FILE* file, __int64 offset, int origin) { LARGE_INTEGER off; DWORD method; off.QuadPart = offset; if (origin == SEEK_END) method = FILE_END; else if (origin == SEEK_CUR) method = FILE_CURRENT; else method = FILE_BEGIN; if (SetFilePointerEx((HANDLE) _get_osfhandle(_fileno(file)), off, NULL, method)) return 0; else return -1; } #else # define LONG_SEEK fseek # define LONG_TELL ftell #endif /*-************************************* * Parameters: Typedefs ***************************************/ struct FIO_prefs_s { /* Algorithm preferences */ FIO_compressionType_t compressionType; U32 sparseFileSupport; /* 0: no sparse allowed; 1: auto (file yes, stdout no); 2: force sparse */ int dictIDFlag; int checksumFlag; int blockSize; int overlapLog; U32 adaptiveMode; int rsyncable; int minAdaptLevel; int maxAdaptLevel; int ldmFlag; int ldmHashLog; int ldmMinMatch; int ldmBucketSizeLog; int ldmHashRateLog; ZSTD_literalCompressionMode_e literalCompressionMode; /* IO preferences */ U32 removeSrcFile; U32 overwrite; /* Computation resources preferences */ unsigned memLimit; int nbWorkers; }; /*-************************************* * Parameters: Initialization ***************************************/ #define FIO_OVERLAP_LOG_NOTSET 9999 #define FIO_LDM_PARAM_NOTSET 9999 FIO_prefs_t* FIO_createPreferences(void) { FIO_prefs_t* const ret = (FIO_prefs_t*)malloc(sizeof(FIO_prefs_t)); if (!ret) EXM_THROW(21, "Allocation error : not enough memory"); ret->compressionType = FIO_zstdCompression; ret->overwrite = 0; ret->sparseFileSupport = ZSTD_SPARSE_DEFAULT; ret->dictIDFlag = 1; ret->checksumFlag = 1; ret->removeSrcFile = 0; ret->memLimit = 0; ret->nbWorkers = 1; ret->blockSize = 0; ret->overlapLog = FIO_OVERLAP_LOG_NOTSET; ret->adaptiveMode = 0; ret->rsyncable = 0; ret->minAdaptLevel = -50; /* initializing this value requires a constant, so ZSTD_minCLevel() doesn't work */ ret->maxAdaptLevel = 22; /* initializing this value requires a constant, so ZSTD_maxCLevel() doesn't work */ ret->ldmFlag = 0; ret->ldmHashLog = 0; ret->ldmMinMatch = 0; ret->ldmBucketSizeLog = FIO_LDM_PARAM_NOTSET; ret->ldmHashRateLog = FIO_LDM_PARAM_NOTSET; ret->literalCompressionMode = ZSTD_lcm_auto; return ret; } void FIO_freePreferences(FIO_prefs_t* const prefs) { free(prefs); } /*-************************************* * Parameters: Display Options ***************************************/ void FIO_setNotificationLevel(int level) { g_display_prefs.displayLevel=level; } void FIO_setNoProgress(unsigned noProgress) { g_display_prefs.noProgress = noProgress; } /*-************************************* * Parameters: Setters ***************************************/ void FIO_setCompressionType(FIO_prefs_t* const prefs, FIO_compressionType_t compressionType) { prefs->compressionType = compressionType; } void FIO_overwriteMode(FIO_prefs_t* const prefs) { prefs->overwrite = 1; } void FIO_setSparseWrite(FIO_prefs_t* const prefs, unsigned sparse) { prefs->sparseFileSupport = sparse; } void FIO_setDictIDFlag(FIO_prefs_t* const prefs, int dictIDFlag) { prefs->dictIDFlag = dictIDFlag; } void FIO_setChecksumFlag(FIO_prefs_t* const prefs, int checksumFlag) { prefs->checksumFlag = checksumFlag; } void FIO_setRemoveSrcFile(FIO_prefs_t* const prefs, unsigned flag) { prefs->removeSrcFile = (flag>0); } void FIO_setMemLimit(FIO_prefs_t* const prefs, unsigned memLimit) { prefs->memLimit = memLimit; } void FIO_setNbWorkers(FIO_prefs_t* const prefs, int nbWorkers) { #ifndef ZSTD_MULTITHREAD if (nbWorkers > 0) DISPLAYLEVEL(2, "Note : multi-threading is disabled \n"); #endif prefs->nbWorkers = nbWorkers; } void FIO_setBlockSize(FIO_prefs_t* const prefs, int blockSize) { if (blockSize && prefs->nbWorkers==0) DISPLAYLEVEL(2, "Setting block size is useless in single-thread mode \n"); prefs->blockSize = blockSize; } void FIO_setOverlapLog(FIO_prefs_t* const prefs, int overlapLog){ if (overlapLog && prefs->nbWorkers==0) DISPLAYLEVEL(2, "Setting overlapLog is useless in single-thread mode \n"); prefs->overlapLog = overlapLog; } void FIO_setAdaptiveMode(FIO_prefs_t* const prefs, unsigned adapt) { if ((adapt>0) && (prefs->nbWorkers==0)) EXM_THROW(1, "Adaptive mode is not compatible with single thread mode \n"); prefs->adaptiveMode = adapt; } void FIO_setRsyncable(FIO_prefs_t* const prefs, int rsyncable) { if ((rsyncable>0) && (prefs->nbWorkers==0)) EXM_THROW(1, "Rsyncable mode is not compatible with single thread mode \n"); prefs->rsyncable = rsyncable; } void FIO_setLiteralCompressionMode( FIO_prefs_t* const prefs, ZSTD_literalCompressionMode_e mode) { prefs->literalCompressionMode = mode; } void FIO_setAdaptMin(FIO_prefs_t* const prefs, int minCLevel) { #ifndef ZSTD_NOCOMPRESS assert(minCLevel >= ZSTD_minCLevel()); #endif prefs->minAdaptLevel = minCLevel; } void FIO_setAdaptMax(FIO_prefs_t* const prefs, int maxCLevel) { prefs->maxAdaptLevel = maxCLevel; } void FIO_setLdmFlag(FIO_prefs_t* const prefs, unsigned ldmFlag) { prefs->ldmFlag = (ldmFlag>0); } void FIO_setLdmHashLog(FIO_prefs_t* const prefs, int ldmHashLog) { prefs->ldmHashLog = ldmHashLog; } void FIO_setLdmMinMatch(FIO_prefs_t* const prefs, int ldmMinMatch) { prefs->ldmMinMatch = ldmMinMatch; } void FIO_setLdmBucketSizeLog(FIO_prefs_t* const prefs, int ldmBucketSizeLog) { prefs->ldmBucketSizeLog = ldmBucketSizeLog; } void FIO_setLdmHashRateLog(FIO_prefs_t* const prefs, int ldmHashRateLog) { prefs->ldmHashRateLog = ldmHashRateLog; } /*-************************************* * Functions ***************************************/ /** FIO_remove() : * @result : Unlink `fileName`, even if it's read-only */ static int FIO_remove(const char* path) { if (!UTIL_isRegularFile(path)) { DISPLAYLEVEL(2, "zstd: Refusing to remove non-regular file %s \n", path); return 0; } #if defined(_WIN32) || defined(WIN32) /* windows doesn't allow remove read-only files, * so try to make it writable first */ chmod(path, _S_IWRITE); #endif return remove(path); } /** FIO_openSrcFile() : * condition : `srcFileName` must be non-NULL. * @result : FILE* to `srcFileName`, or NULL if it fails */ static FILE* FIO_openSrcFile(const char* srcFileName) { assert(srcFileName != NULL); if (!strcmp (srcFileName, stdinmark)) { DISPLAYLEVEL(4,"Using stdin for input \n"); SET_BINARY_MODE(stdin); return stdin; } if (!UTIL_fileExist(srcFileName)) { DISPLAYLEVEL(1, "zstd: can't stat %s : %s -- ignored \n", srcFileName, strerror(errno)); return NULL; } if (!UTIL_isRegularFile(srcFileName)) { DISPLAYLEVEL(1, "zstd: %s is not a regular file -- ignored \n", srcFileName); return NULL; } { FILE* const f = fopen(srcFileName, "rb"); if (f == NULL) DISPLAYLEVEL(1, "zstd: %s: %s \n", srcFileName, strerror(errno)); return f; } } /** FIO_openDstFile() : * condition : `dstFileName` must be non-NULL. * @result : FILE* to `dstFileName`, or NULL if it fails */ static FILE* FIO_openDstFile(FIO_prefs_t* const prefs, const char* srcFileName, const char* dstFileName) { assert(dstFileName != NULL); if (!strcmp (dstFileName, stdoutmark)) { DISPLAYLEVEL(4,"Using stdout for output \n"); SET_BINARY_MODE(stdout); if (prefs->sparseFileSupport == 1) { prefs->sparseFileSupport = 0; DISPLAYLEVEL(4, "Sparse File Support is automatically disabled on stdout ; try --sparse \n"); } return stdout; } /* ensure dst is not the same as src */ if (srcFileName != NULL && UTIL_isSameFile(srcFileName, dstFileName)) { DISPLAYLEVEL(1, "zstd: Refusing to open an output file which will overwrite the input file \n"); return NULL; } if (prefs->sparseFileSupport == 1) { prefs->sparseFileSupport = ZSTD_SPARSE_DEFAULT; } if (UTIL_isRegularFile(dstFileName)) { /* Check if destination file already exists */ FILE* const fCheck = fopen( dstFileName, "rb" ); if (!strcmp(dstFileName, nulmark)) { EXM_THROW(40, "%s is unexpectedly categorized as a regular file", dstFileName); } if (fCheck != NULL) { /* dst file exists, authorization prompt */ fclose(fCheck); if (!prefs->overwrite) { if (g_display_prefs.displayLevel <= 1) { /* No interaction possible */ DISPLAY("zstd: %s already exists; not overwritten \n", dstFileName); return NULL; } DISPLAY("zstd: %s already exists; overwrite (y/N) ? ", dstFileName); { int ch = getchar(); if ((ch!='Y') && (ch!='y')) { DISPLAY(" not overwritten \n"); return NULL; } /* flush rest of input line */ while ((ch!=EOF) && (ch!='\n')) ch = getchar(); } } /* need to unlink */ FIO_remove(dstFileName); } } { FILE* const f = fopen( dstFileName, "wb" ); if (f == NULL) DISPLAYLEVEL(1, "zstd: %s: %s\n", dstFileName, strerror(errno)); return f; } } /*! FIO_createDictBuffer() : * creates a buffer, pointed by `*bufferPtr`, * loads `filename` content into it, up to DICTSIZE_MAX bytes. * @return : loaded size * if fileName==NULL, returns 0 and a NULL pointer */ static size_t FIO_createDictBuffer(void** bufferPtr, const char* fileName) { FILE* fileHandle; U64 fileSize; assert(bufferPtr != NULL); *bufferPtr = NULL; if (fileName == NULL) return 0; DISPLAYLEVEL(4,"Loading %s as dictionary \n", fileName); fileHandle = fopen(fileName, "rb"); if (fileHandle==NULL) EXM_THROW(31, "%s: %s", fileName, strerror(errno)); fileSize = UTIL_getFileSize(fileName); if (fileSize > DICTSIZE_MAX) { EXM_THROW(32, "Dictionary file %s is too large (> %u MB)", fileName, DICTSIZE_MAX >> 20); /* avoid extreme cases */ } *bufferPtr = malloc((size_t)fileSize); if (*bufferPtr==NULL) EXM_THROW(34, "%s", strerror(errno)); { size_t const readSize = fread(*bufferPtr, 1, (size_t)fileSize, fileHandle); if (readSize != fileSize) EXM_THROW(35, "Error reading dictionary file %s : %s", fileName, strerror(errno)); } fclose(fileHandle); return (size_t)fileSize; } #ifndef ZSTD_NOCOMPRESS /* ********************************************************************** * Compression ************************************************************************/ typedef struct { FILE* srcFile; FILE* dstFile; void* srcBuffer; size_t srcBufferSize; void* dstBuffer; size_t dstBufferSize; const char* dictFileName; ZSTD_CStream* cctx; } cRess_t; static cRess_t FIO_createCResources(FIO_prefs_t* const prefs, const char* dictFileName, int cLevel, U64 srcSize, ZSTD_compressionParameters comprParams) { cRess_t ress; memset(&ress, 0, sizeof(ress)); DISPLAYLEVEL(6, "FIO_createCResources \n"); ress.cctx = ZSTD_createCCtx(); if (ress.cctx == NULL) EXM_THROW(30, "allocation error (%s): can't create ZSTD_CCtx", strerror(errno)); ress.srcBufferSize = ZSTD_CStreamInSize(); ress.srcBuffer = malloc(ress.srcBufferSize); ress.dstBufferSize = ZSTD_CStreamOutSize(); ress.dstBuffer = malloc(ress.dstBufferSize); if (!ress.srcBuffer || !ress.dstBuffer) EXM_THROW(31, "allocation error : not enough memory"); /* Advanced parameters, including dictionary */ { void* dictBuffer; size_t const dictBuffSize = FIO_createDictBuffer(&dictBuffer, dictFileName); /* works with dictFileName==NULL */ if (dictFileName && (dictBuffer==NULL)) EXM_THROW(32, "allocation error : can't create dictBuffer"); ress.dictFileName = dictFileName; if (prefs->adaptiveMode && !prefs->ldmFlag && !comprParams.windowLog) comprParams.windowLog = ADAPT_WINDOWLOG_DEFAULT; CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_c_contentSizeFlag, 1) ); /* always enable content size when available (note: supposed to be default) */ CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_c_dictIDFlag, prefs->dictIDFlag) ); CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_c_checksumFlag, prefs->checksumFlag) ); /* compression level */ CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_c_compressionLevel, cLevel) ); /* long distance matching */ CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_c_enableLongDistanceMatching, prefs->ldmFlag) ); CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_c_ldmHashLog, prefs->ldmHashLog) ); CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_c_ldmMinMatch, prefs->ldmMinMatch) ); if (prefs->ldmBucketSizeLog != FIO_LDM_PARAM_NOTSET) { CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_c_ldmBucketSizeLog, prefs->ldmBucketSizeLog) ); } if (prefs->ldmHashRateLog != FIO_LDM_PARAM_NOTSET) { CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_c_ldmHashRateLog, prefs->ldmHashRateLog) ); } /* compression parameters */ CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_c_windowLog, (int)comprParams.windowLog) ); CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_c_chainLog, (int)comprParams.chainLog) ); CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_c_hashLog, (int)comprParams.hashLog) ); CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_c_searchLog, (int)comprParams.searchLog) ); CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_c_minMatch, (int)comprParams.minMatch) ); CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_c_targetLength, (int)comprParams.targetLength) ); CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_c_strategy, comprParams.strategy) ); CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_c_literalCompressionMode, (int)prefs->literalCompressionMode) ); /* multi-threading */ #ifdef ZSTD_MULTITHREAD DISPLAYLEVEL(5,"set nb workers = %u \n", prefs->nbWorkers); CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_c_nbWorkers, prefs->nbWorkers) ); CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_c_jobSize, prefs->blockSize) ); if (prefs->overlapLog != FIO_OVERLAP_LOG_NOTSET) { DISPLAYLEVEL(3,"set overlapLog = %u \n", prefs->overlapLog); CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_c_overlapLog, prefs->overlapLog) ); } CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_c_rsyncable, prefs->rsyncable) ); #endif /* dictionary */ CHECK( ZSTD_CCtx_setPledgedSrcSize(ress.cctx, srcSize) ); /* set the value temporarily for dictionary loading, to adapt compression parameters */ CHECK( ZSTD_CCtx_loadDictionary(ress.cctx, dictBuffer, dictBuffSize) ); CHECK( ZSTD_CCtx_setPledgedSrcSize(ress.cctx, ZSTD_CONTENTSIZE_UNKNOWN) ); /* reset */ free(dictBuffer); } return ress; } static void FIO_freeCResources(cRess_t ress) { free(ress.srcBuffer); free(ress.dstBuffer); ZSTD_freeCStream(ress.cctx); /* never fails */ } #ifdef ZSTD_GZCOMPRESS static unsigned long long FIO_compressGzFrame(cRess_t* ress, const char* srcFileName, U64 const srcFileSize, int compressionLevel, U64* readsize) { unsigned long long inFileSize = 0, outFileSize = 0; z_stream strm; int ret; if (compressionLevel > Z_BEST_COMPRESSION) compressionLevel = Z_BEST_COMPRESSION; strm.zalloc = Z_NULL; strm.zfree = Z_NULL; strm.opaque = Z_NULL; ret = deflateInit2(&strm, compressionLevel, Z_DEFLATED, 15 /* maxWindowLogSize */ + 16 /* gzip only */, 8, Z_DEFAULT_STRATEGY); /* see http://www.zlib.net/manual.html */ if (ret != Z_OK) EXM_THROW(71, "zstd: %s: deflateInit2 error %d \n", srcFileName, ret); strm.next_in = 0; strm.avail_in = 0; strm.next_out = (Bytef*)ress->dstBuffer; strm.avail_out = (uInt)ress->dstBufferSize; while (1) { if (strm.avail_in == 0) { size_t const inSize = fread(ress->srcBuffer, 1, ress->srcBufferSize, ress->srcFile); if (inSize == 0) break; inFileSize += inSize; strm.next_in = (z_const unsigned char*)ress->srcBuffer; strm.avail_in = (uInt)inSize; } ret = deflate(&strm, Z_NO_FLUSH); if (ret != Z_OK) EXM_THROW(72, "zstd: %s: deflate error %d \n", srcFileName, ret); { size_t const decompBytes = ress->dstBufferSize - strm.avail_out; if (decompBytes) { if (fwrite(ress->dstBuffer, 1, decompBytes, ress->dstFile) != decompBytes) EXM_THROW(73, "Write error : cannot write to output file"); outFileSize += decompBytes; strm.next_out = (Bytef*)ress->dstBuffer; strm.avail_out = (uInt)ress->dstBufferSize; } } if (srcFileSize == UTIL_FILESIZE_UNKNOWN) DISPLAYUPDATE(2, "\rRead : %u MB ==> %.2f%%", (unsigned)(inFileSize>>20), (double)outFileSize/inFileSize*100) else DISPLAYUPDATE(2, "\rRead : %u / %u MB ==> %.2f%%", (unsigned)(inFileSize>>20), (unsigned)(srcFileSize>>20), (double)outFileSize/inFileSize*100); } while (1) { ret = deflate(&strm, Z_FINISH); { size_t const decompBytes = ress->dstBufferSize - strm.avail_out; if (decompBytes) { if (fwrite(ress->dstBuffer, 1, decompBytes, ress->dstFile) != decompBytes) EXM_THROW(75, "Write error : %s", strerror(errno)); outFileSize += decompBytes; strm.next_out = (Bytef*)ress->dstBuffer; strm.avail_out = (uInt)ress->dstBufferSize; } } if (ret == Z_STREAM_END) break; if (ret != Z_BUF_ERROR) EXM_THROW(77, "zstd: %s: deflate error %d \n", srcFileName, ret); } ret = deflateEnd(&strm); if (ret != Z_OK) EXM_THROW(79, "zstd: %s: deflateEnd error %d \n", srcFileName, ret); *readsize = inFileSize; return outFileSize; } #endif #ifdef ZSTD_LZMACOMPRESS static unsigned long long FIO_compressLzmaFrame(cRess_t* ress, const char* srcFileName, U64 const srcFileSize, int compressionLevel, U64* readsize, int plain_lzma) { unsigned long long inFileSize = 0, outFileSize = 0; lzma_stream strm = LZMA_STREAM_INIT; lzma_action action = LZMA_RUN; lzma_ret ret; if (compressionLevel < 0) compressionLevel = 0; if (compressionLevel > 9) compressionLevel = 9; if (plain_lzma) { lzma_options_lzma opt_lzma; if (lzma_lzma_preset(&opt_lzma, compressionLevel)) EXM_THROW(71, "zstd: %s: lzma_lzma_preset error", srcFileName); ret = lzma_alone_encoder(&strm, &opt_lzma); /* LZMA */ if (ret != LZMA_OK) EXM_THROW(71, "zstd: %s: lzma_alone_encoder error %d", srcFileName, ret); } else { ret = lzma_easy_encoder(&strm, compressionLevel, LZMA_CHECK_CRC64); /* XZ */ if (ret != LZMA_OK) EXM_THROW(71, "zstd: %s: lzma_easy_encoder error %d", srcFileName, ret); } strm.next_in = 0; strm.avail_in = 0; strm.next_out = (BYTE*)ress->dstBuffer; strm.avail_out = ress->dstBufferSize; while (1) { if (strm.avail_in == 0) { size_t const inSize = fread(ress->srcBuffer, 1, ress->srcBufferSize, ress->srcFile); if (inSize == 0) action = LZMA_FINISH; inFileSize += inSize; strm.next_in = (BYTE const*)ress->srcBuffer; strm.avail_in = inSize; } ret = lzma_code(&strm, action); if (ret != LZMA_OK && ret != LZMA_STREAM_END) EXM_THROW(72, "zstd: %s: lzma_code encoding error %d", srcFileName, ret); { size_t const compBytes = ress->dstBufferSize - strm.avail_out; if (compBytes) { if (fwrite(ress->dstBuffer, 1, compBytes, ress->dstFile) != compBytes) EXM_THROW(73, "Write error : %s", strerror(errno)); outFileSize += compBytes; strm.next_out = (BYTE*)ress->dstBuffer; strm.avail_out = ress->dstBufferSize; } } if (srcFileSize == UTIL_FILESIZE_UNKNOWN) DISPLAYUPDATE(2, "\rRead : %u MB ==> %.2f%%", (unsigned)(inFileSize>>20), (double)outFileSize/inFileSize*100) else DISPLAYUPDATE(2, "\rRead : %u / %u MB ==> %.2f%%", (unsigned)(inFileSize>>20), (unsigned)(srcFileSize>>20), (double)outFileSize/inFileSize*100); if (ret == LZMA_STREAM_END) break; } lzma_end(&strm); *readsize = inFileSize; return outFileSize; } #endif #ifdef ZSTD_LZ4COMPRESS #if LZ4_VERSION_NUMBER <= 10600 #define LZ4F_blockLinked blockLinked #define LZ4F_max64KB max64KB #endif static int FIO_LZ4_GetBlockSize_FromBlockId (int id) { return (1 << (8 + (2 * id))); } static unsigned long long FIO_compressLz4Frame(cRess_t* ress, const char* srcFileName, U64 const srcFileSize, int compressionLevel, int checksumFlag, U64* readsize) { const size_t blockSize = FIO_LZ4_GetBlockSize_FromBlockId(LZ4F_max64KB); unsigned long long inFileSize = 0, outFileSize = 0; LZ4F_preferences_t prefs; LZ4F_compressionContext_t ctx; LZ4F_errorCode_t const errorCode = LZ4F_createCompressionContext(&ctx, LZ4F_VERSION); if (LZ4F_isError(errorCode)) EXM_THROW(31, "zstd: failed to create lz4 compression context"); memset(&prefs, 0, sizeof(prefs)); assert(blockSize <= ress->srcBufferSize); prefs.autoFlush = 1; prefs.compressionLevel = compressionLevel; prefs.frameInfo.blockMode = LZ4F_blockLinked; prefs.frameInfo.blockSizeID = LZ4F_max64KB; prefs.frameInfo.contentChecksumFlag = (contentChecksum_t)checksumFlag; #if LZ4_VERSION_NUMBER >= 10600 prefs.frameInfo.contentSize = (srcFileSize==UTIL_FILESIZE_UNKNOWN) ? 0 : srcFileSize; #endif assert(LZ4F_compressBound(blockSize, &prefs) <= ress->dstBufferSize); { size_t readSize; size_t headerSize = LZ4F_compressBegin(ctx, ress->dstBuffer, ress->dstBufferSize, &prefs); if (LZ4F_isError(headerSize)) EXM_THROW(33, "File header generation failed : %s", LZ4F_getErrorName(headerSize)); if (fwrite(ress->dstBuffer, 1, headerSize, ress->dstFile) != headerSize) EXM_THROW(34, "Write error : %s (cannot write header)", strerror(errno)); outFileSize += headerSize; /* Read first block */ readSize = fread(ress->srcBuffer, (size_t)1, (size_t)blockSize, ress->srcFile); inFileSize += readSize; /* Main Loop */ while (readSize>0) { size_t const outSize = LZ4F_compressUpdate(ctx, ress->dstBuffer, ress->dstBufferSize, ress->srcBuffer, readSize, NULL); if (LZ4F_isError(outSize)) EXM_THROW(35, "zstd: %s: lz4 compression failed : %s", srcFileName, LZ4F_getErrorName(outSize)); outFileSize += outSize; if (srcFileSize == UTIL_FILESIZE_UNKNOWN) { DISPLAYUPDATE(2, "\rRead : %u MB ==> %.2f%%", (unsigned)(inFileSize>>20), (double)outFileSize/inFileSize*100) } else { DISPLAYUPDATE(2, "\rRead : %u / %u MB ==> %.2f%%", (unsigned)(inFileSize>>20), (unsigned)(srcFileSize>>20), (double)outFileSize/inFileSize*100); } /* Write Block */ { size_t const sizeCheck = fwrite(ress->dstBuffer, 1, outSize, ress->dstFile); if (sizeCheck != outSize) EXM_THROW(36, "Write error : %s", strerror(errno)); } /* Read next block */ readSize = fread(ress->srcBuffer, (size_t)1, (size_t)blockSize, ress->srcFile); inFileSize += readSize; } if (ferror(ress->srcFile)) EXM_THROW(37, "Error reading %s ", srcFileName); /* End of Stream mark */ headerSize = LZ4F_compressEnd(ctx, ress->dstBuffer, ress->dstBufferSize, NULL); if (LZ4F_isError(headerSize)) EXM_THROW(38, "zstd: %s: lz4 end of file generation failed : %s", srcFileName, LZ4F_getErrorName(headerSize)); { size_t const sizeCheck = fwrite(ress->dstBuffer, 1, headerSize, ress->dstFile); if (sizeCheck != headerSize) EXM_THROW(39, "Write error : %s (cannot write end of stream)", strerror(errno)); } outFileSize += headerSize; } *readsize = inFileSize; LZ4F_freeCompressionContext(ctx); return outFileSize; } #endif static unsigned long long FIO_compressZstdFrame(FIO_prefs_t* const prefs, const cRess_t* ressPtr, const char* srcFileName, U64 fileSize, int compressionLevel, U64* readsize) { cRess_t const ress = *ressPtr; FILE* const srcFile = ress.srcFile; FILE* const dstFile = ress.dstFile; U64 compressedfilesize = 0; ZSTD_EndDirective directive = ZSTD_e_continue; /* stats */ ZSTD_frameProgression previous_zfp_update = { 0, 0, 0, 0, 0, 0 }; ZSTD_frameProgression previous_zfp_correction = { 0, 0, 0, 0, 0, 0 }; typedef enum { noChange, slower, faster } speedChange_e; speedChange_e speedChange = noChange; unsigned flushWaiting = 0; unsigned inputPresented = 0; unsigned inputBlocked = 0; unsigned lastJobID = 0; DISPLAYLEVEL(6, "compression using zstd format \n"); /* init */ if (fileSize != UTIL_FILESIZE_UNKNOWN) { CHECK(ZSTD_CCtx_setPledgedSrcSize(ress.cctx, fileSize)); } (void)srcFileName; /* Main compression loop */ do { size_t stillToFlush; /* Fill input Buffer */ size_t const inSize = fread(ress.srcBuffer, (size_t)1, ress.srcBufferSize, srcFile); ZSTD_inBuffer inBuff = { ress.srcBuffer, inSize, 0 }; DISPLAYLEVEL(6, "fread %u bytes from source \n", (unsigned)inSize); *readsize += inSize; if ((inSize == 0) || (*readsize == fileSize)) directive = ZSTD_e_end; stillToFlush = 1; while ((inBuff.pos != inBuff.size) /* input buffer must be entirely ingested */ || (directive == ZSTD_e_end && stillToFlush != 0) ) { size_t const oldIPos = inBuff.pos; ZSTD_outBuffer outBuff = { ress.dstBuffer, ress.dstBufferSize, 0 }; size_t const toFlushNow = ZSTD_toFlushNow(ress.cctx); CHECK_V(stillToFlush, ZSTD_compressStream2(ress.cctx, &outBuff, &inBuff, directive)); /* count stats */ inputPresented++; if (oldIPos == inBuff.pos) inputBlocked++; /* input buffer is full and can't take any more : input speed is faster than consumption rate */ if (!toFlushNow) flushWaiting = 1; /* Write compressed stream */ DISPLAYLEVEL(6, "ZSTD_compress_generic(end:%u) => input pos(%u)<=(%u)size ; output generated %u bytes \n", (unsigned)directive, (unsigned)inBuff.pos, (unsigned)inBuff.size, (unsigned)outBuff.pos); if (outBuff.pos) { size_t const sizeCheck = fwrite(ress.dstBuffer, 1, outBuff.pos, dstFile); if (sizeCheck != outBuff.pos) EXM_THROW(25, "Write error : %s (cannot write compressed block)", strerror(errno)); compressedfilesize += outBuff.pos; } /* display notification; and adapt compression level */ if (READY_FOR_UPDATE()) { ZSTD_frameProgression const zfp = ZSTD_getFrameProgression(ress.cctx); double const cShare = (double)zfp.produced / (zfp.consumed + !zfp.consumed/*avoid div0*/) * 100; /* display progress notifications */ if (g_display_prefs.displayLevel >= 3) { DISPLAYUPDATE(3, "\r(L%i) Buffered :%4u MB - Consumed :%4u MB - Compressed :%4u MB => %.2f%% ", compressionLevel, (unsigned)((zfp.ingested - zfp.consumed) >> 20), (unsigned)(zfp.consumed >> 20), (unsigned)(zfp.produced >> 20), cShare ); } else { /* summarized notifications if == 2; */ DISPLAYLEVEL(2, "\rRead : %u ", (unsigned)(zfp.consumed >> 20)); if (fileSize != UTIL_FILESIZE_UNKNOWN) DISPLAYLEVEL(2, "/ %u ", (unsigned)(fileSize >> 20)); DISPLAYLEVEL(2, "MB ==> %2.f%% ", cShare); DELAY_NEXT_UPDATE(); } /* adaptive mode : statistics measurement and speed correction */ if (prefs->adaptiveMode) { /* check output speed */ if (zfp.currentJobID > 1) { /* only possible if nbWorkers >= 1 */ unsigned long long newlyProduced = zfp.produced - previous_zfp_update.produced; unsigned long long newlyFlushed = zfp.flushed - previous_zfp_update.flushed; assert(zfp.produced >= previous_zfp_update.produced); assert(prefs->nbWorkers >= 1); /* test if compression is blocked * either because output is slow and all buffers are full * or because input is slow and no job can start while waiting for at least one buffer to be filled. * note : exclude starting part, since currentJobID > 1 */ if ( (zfp.consumed == previous_zfp_update.consumed) /* no data compressed : no data available, or no more buffer to compress to, OR compression is really slow (compression of a single block is slower than update rate)*/ && (zfp.nbActiveWorkers == 0) /* confirmed : no compression ongoing */ ) { DISPLAYLEVEL(6, "all buffers full : compression stopped => slow down \n") speedChange = slower; } previous_zfp_update = zfp; if ( (newlyProduced > (newlyFlushed * 9 / 8)) /* compression produces more data than output can flush (though production can be spiky, due to work unit : (N==4)*block sizes) */ && (flushWaiting == 0) /* flush speed was never slowed by lack of production, so it's operating at max capacity */ ) { DISPLAYLEVEL(6, "compression faster than flush (%llu > %llu), and flushed was never slowed down by lack of production => slow down \n", newlyProduced, newlyFlushed); speedChange = slower; } flushWaiting = 0; } /* course correct only if there is at least one new job completed */ if (zfp.currentJobID > lastJobID) { DISPLAYLEVEL(6, "compression level adaptation check \n") /* check input speed */ if (zfp.currentJobID > (unsigned)(prefs->nbWorkers+1)) { /* warm up period, to fill all workers */ if (inputBlocked <= 0) { DISPLAYLEVEL(6, "input is never blocked => input is slower than ingestion \n"); speedChange = slower; } else if (speedChange == noChange) { unsigned long long newlyIngested = zfp.ingested - previous_zfp_correction.ingested; unsigned long long newlyConsumed = zfp.consumed - previous_zfp_correction.consumed; unsigned long long newlyProduced = zfp.produced - previous_zfp_correction.produced; unsigned long long newlyFlushed = zfp.flushed - previous_zfp_correction.flushed; previous_zfp_correction = zfp; assert(inputPresented > 0); DISPLAYLEVEL(6, "input blocked %u/%u(%.2f) - ingested:%u vs %u:consumed - flushed:%u vs %u:produced \n", inputBlocked, inputPresented, (double)inputBlocked/inputPresented*100, (unsigned)newlyIngested, (unsigned)newlyConsumed, (unsigned)newlyFlushed, (unsigned)newlyProduced); if ( (inputBlocked > inputPresented / 8) /* input is waiting often, because input buffers is full : compression or output too slow */ && (newlyFlushed * 33 / 32 > newlyProduced) /* flush everything that is produced */ && (newlyIngested * 33 / 32 > newlyConsumed) /* input speed as fast or faster than compression speed */ ) { DISPLAYLEVEL(6, "recommend faster as in(%llu) >= (%llu)comp(%llu) <= out(%llu) \n", newlyIngested, newlyConsumed, newlyProduced, newlyFlushed); speedChange = faster; } } inputBlocked = 0; inputPresented = 0; } if (speedChange == slower) { DISPLAYLEVEL(6, "slower speed , higher compression \n") compressionLevel ++; if (compressionLevel > ZSTD_maxCLevel()) compressionLevel = ZSTD_maxCLevel(); if (compressionLevel > prefs->maxAdaptLevel) compressionLevel = prefs->maxAdaptLevel; compressionLevel += (compressionLevel == 0); /* skip 0 */ ZSTD_CCtx_setParameter(ress.cctx, ZSTD_c_compressionLevel, compressionLevel); } if (speedChange == faster) { DISPLAYLEVEL(6, "faster speed , lighter compression \n") compressionLevel --; if (compressionLevel < prefs->minAdaptLevel) compressionLevel = prefs->minAdaptLevel; compressionLevel -= (compressionLevel == 0); /* skip 0 */ ZSTD_CCtx_setParameter(ress.cctx, ZSTD_c_compressionLevel, compressionLevel); } speedChange = noChange; lastJobID = zfp.currentJobID; } /* if (zfp.currentJobID > lastJobID) */ } /* if (g_adaptiveMode) */ } /* if (READY_FOR_UPDATE()) */ } /* while ((inBuff.pos != inBuff.size) */ } while (directive != ZSTD_e_end); if (ferror(srcFile)) { EXM_THROW(26, "Read error : I/O error"); } if (fileSize != UTIL_FILESIZE_UNKNOWN && *readsize != fileSize) { EXM_THROW(27, "Read error : Incomplete read : %llu / %llu B", (unsigned long long)*readsize, (unsigned long long)fileSize); } return compressedfilesize; } /*! FIO_compressFilename_internal() : * same as FIO_compressFilename_extRess(), with `ress.desFile` already opened. * @return : 0 : compression completed correctly, * 1 : missing or pb opening srcFileName */ static int FIO_compressFilename_internal(FIO_prefs_t* const prefs, cRess_t ress, const char* dstFileName, const char* srcFileName, int compressionLevel) { U64 readsize = 0; U64 compressedfilesize = 0; U64 const fileSize = UTIL_getFileSize(srcFileName); DISPLAYLEVEL(5, "%s: %u bytes \n", srcFileName, (unsigned)fileSize); /* compression format selection */ switch (prefs->compressionType) { default: case FIO_zstdCompression: compressedfilesize = FIO_compressZstdFrame(prefs, &ress, srcFileName, fileSize, compressionLevel, &readsize); break; case FIO_gzipCompression: #ifdef ZSTD_GZCOMPRESS compressedfilesize = FIO_compressGzFrame(&ress, srcFileName, fileSize, compressionLevel, &readsize); #else (void)compressionLevel; EXM_THROW(20, "zstd: %s: file cannot be compressed as gzip (zstd compiled without ZSTD_GZCOMPRESS) -- ignored \n", srcFileName); #endif break; case FIO_xzCompression: case FIO_lzmaCompression: #ifdef ZSTD_LZMACOMPRESS compressedfilesize = FIO_compressLzmaFrame(&ress, srcFileName, fileSize, compressionLevel, &readsize, prefs->compressionType==FIO_lzmaCompression); #else (void)compressionLevel; EXM_THROW(20, "zstd: %s: file cannot be compressed as xz/lzma (zstd compiled without ZSTD_LZMACOMPRESS) -- ignored \n", srcFileName); #endif break; case FIO_lz4Compression: #ifdef ZSTD_LZ4COMPRESS compressedfilesize = FIO_compressLz4Frame(&ress, srcFileName, fileSize, compressionLevel, prefs->checksumFlag, &readsize); #else (void)compressionLevel; EXM_THROW(20, "zstd: %s: file cannot be compressed as lz4 (zstd compiled without ZSTD_LZ4COMPRESS) -- ignored \n", srcFileName); #endif break; } /* Status */ DISPLAYLEVEL(2, "\r%79s\r", ""); DISPLAYLEVEL(2,"%-20s :%6.2f%% (%6llu => %6llu bytes, %s) \n", srcFileName, (double)compressedfilesize / (readsize+(!readsize)/*avoid div by zero*/) * 100, (unsigned long long)readsize, (unsigned long long) compressedfilesize, dstFileName); return 0; } /*! FIO_compressFilename_dstFile() : * open dstFileName, or pass-through if ress.dstFile != NULL, * then start compression with FIO_compressFilename_internal(). * Manages source removal (--rm) and file permissions transfer. * note : ress.srcFile must be != NULL, * so reach this function through FIO_compressFilename_srcFile(). * @return : 0 : compression completed correctly, * 1 : pb */ static int FIO_compressFilename_dstFile(FIO_prefs_t* const prefs, cRess_t ress, const char* dstFileName, const char* srcFileName, int compressionLevel) { int closeDstFile = 0; int result; stat_t statbuf; int transfer_permissions = 0; assert(ress.srcFile != NULL); if (ress.dstFile == NULL) { closeDstFile = 1; DISPLAYLEVEL(6, "FIO_compressFilename_dstFile: opening dst: %s", dstFileName); ress.dstFile = FIO_openDstFile(prefs, srcFileName, dstFileName); if (ress.dstFile==NULL) return 1; /* could not open dstFileName */ /* Must only be added after FIO_openDstFile() succeeds. * Otherwise we may delete the destination file if it already exists, * and the user presses Ctrl-C when asked if they wish to overwrite. */ addHandler(dstFileName); if ( strcmp (srcFileName, stdinmark) && UTIL_getFileStat(srcFileName, &statbuf)) transfer_permissions = 1; } result = FIO_compressFilename_internal(prefs, ress, dstFileName, srcFileName, compressionLevel); if (closeDstFile) { FILE* const dstFile = ress.dstFile; ress.dstFile = NULL; clearHandler(); if (fclose(dstFile)) { /* error closing dstFile */ DISPLAYLEVEL(1, "zstd: %s: %s \n", dstFileName, strerror(errno)); result=1; } if ( (result != 0) /* operation failure */ && strcmp(dstFileName, nulmark) /* special case : don't remove() /dev/null */ && strcmp(dstFileName, stdoutmark) /* special case : don't remove() stdout */ ) { FIO_remove(dstFileName); /* remove compression artefact; note don't do anything special if remove() fails */ } else if ( strcmp(dstFileName, stdoutmark) && strcmp(dstFileName, nulmark) && transfer_permissions) { UTIL_setFileStat(dstFileName, &statbuf); } } return result; } /*! FIO_compressFilename_srcFile() : * @return : 0 : compression completed correctly, * 1 : missing or pb opening srcFileName */ static int FIO_compressFilename_srcFile(FIO_prefs_t* const prefs, cRess_t ress, const char* dstFileName, const char* srcFileName, int compressionLevel) { int result; /* ensure src is not a directory */ if (UTIL_isDirectory(srcFileName)) { DISPLAYLEVEL(1, "zstd: %s is a directory -- ignored \n", srcFileName); return 1; } /* ensure src is not the same as dict (if present) */ if (ress.dictFileName != NULL && UTIL_isSameFile(srcFileName, ress.dictFileName)) { DISPLAYLEVEL(1, "zstd: cannot use %s as an input file and dictionary \n", srcFileName); return 1; } ress.srcFile = FIO_openSrcFile(srcFileName); if (ress.srcFile == NULL) return 1; /* srcFile could not be opened */ result = FIO_compressFilename_dstFile(prefs, ress, dstFileName, srcFileName, compressionLevel); fclose(ress.srcFile); ress.srcFile = NULL; if ( prefs->removeSrcFile /* --rm */ && result == 0 /* success */ && strcmp(srcFileName, stdinmark) /* exception : don't erase stdin */ ) { /* We must clear the handler, since after this point calling it would * delete both the source and destination files. */ clearHandler(); if (FIO_remove(srcFileName)) EXM_THROW(1, "zstd: %s: %s", srcFileName, strerror(errno)); } return result; } int FIO_compressFilename(FIO_prefs_t* const prefs, const char* dstFileName, const char* srcFileName, const char* dictFileName, int compressionLevel, ZSTD_compressionParameters comprParams) { clock_t const start = clock(); U64 const fileSize = UTIL_getFileSize(srcFileName); U64 const srcSize = (fileSize == UTIL_FILESIZE_UNKNOWN) ? ZSTD_CONTENTSIZE_UNKNOWN : fileSize; cRess_t const ress = FIO_createCResources(prefs, dictFileName, compressionLevel, srcSize, comprParams); int const result = FIO_compressFilename_srcFile(prefs, ress, dstFileName, srcFileName, compressionLevel); double const seconds = (double)(clock() - start) / CLOCKS_PER_SEC; DISPLAYLEVEL(4, "Completed in %.2f sec \n", seconds); FIO_freeCResources(ress); return result; } /* FIO_determineCompressedName() : * create a destination filename for compressed srcFileName. * @return a pointer to it. * This function never returns an error (it may abort() in case of pb) */ static const char* FIO_determineCompressedName(const char* srcFileName, const char* suffix) { static size_t dfnbCapacity = 0; static char* dstFileNameBuffer = NULL; /* using static allocation : this function cannot be multi-threaded */ size_t const sfnSize = strlen(srcFileName); size_t const suffixSize = strlen(suffix); if (dfnbCapacity <= sfnSize+suffixSize+1) { /* resize buffer for dstName */ free(dstFileNameBuffer); dfnbCapacity = sfnSize + suffixSize + 30; dstFileNameBuffer = (char*)malloc(dfnbCapacity); if (!dstFileNameBuffer) { EXM_THROW(30, "zstd: %s", strerror(errno)); } } assert(dstFileNameBuffer != NULL); memcpy(dstFileNameBuffer, srcFileName, sfnSize); memcpy(dstFileNameBuffer+sfnSize, suffix, suffixSize+1 /* Include terminating null */); return dstFileNameBuffer; } /* FIO_compressMultipleFilenames() : * compress nbFiles files * into one destination (outFileName) * or into one file each (outFileName == NULL, but suffix != NULL). */ int FIO_compressMultipleFilenames(FIO_prefs_t* const prefs, const char** inFileNamesTable, unsigned nbFiles, const char* outFileName, const char* suffix, const char* dictFileName, int compressionLevel, ZSTD_compressionParameters comprParams) { int error = 0; U64 const firstFileSize = UTIL_getFileSize(inFileNamesTable[0]); U64 const firstSrcSize = (firstFileSize == UTIL_FILESIZE_UNKNOWN) ? ZSTD_CONTENTSIZE_UNKNOWN : firstFileSize; U64 const srcSize = (nbFiles != 1) ? ZSTD_CONTENTSIZE_UNKNOWN : firstSrcSize ; cRess_t ress = FIO_createCResources(prefs, dictFileName, compressionLevel, srcSize, comprParams); /* init */ assert(outFileName != NULL || suffix != NULL); if (outFileName != NULL) { /* output into a single destination (stdout typically) */ ress.dstFile = FIO_openDstFile(prefs, NULL, outFileName); if (ress.dstFile == NULL) { /* could not open outFileName */ error = 1; } else { unsigned u; for (u=0; u<nbFiles; u++) error |= FIO_compressFilename_srcFile(prefs, ress, outFileName, inFileNamesTable[u], compressionLevel); if (fclose(ress.dstFile)) EXM_THROW(29, "Write error (%s) : cannot properly close %s", strerror(errno), outFileName); ress.dstFile = NULL; } } else { unsigned u; for (u=0; u<nbFiles; u++) { const char* const srcFileName = inFileNamesTable[u]; const char* const dstFileName = FIO_determineCompressedName(srcFileName, suffix); /* cannot fail */ error |= FIO_compressFilename_srcFile(prefs, ress, dstFileName, srcFileName, compressionLevel); } } FIO_freeCResources(ress); return error; } #endif /* #ifndef ZSTD_NOCOMPRESS */ #ifndef ZSTD_NODECOMPRESS /* ************************************************************************** * Decompression ***************************************************************************/ typedef struct { void* srcBuffer; size_t srcBufferSize; size_t srcBufferLoaded; void* dstBuffer; size_t dstBufferSize; ZSTD_DStream* dctx; FILE* dstFile; } dRess_t; static dRess_t FIO_createDResources(FIO_prefs_t* const prefs, const char* dictFileName) { dRess_t ress; memset(&ress, 0, sizeof(ress)); /* Allocation */ ress.dctx = ZSTD_createDStream(); if (ress.dctx==NULL) EXM_THROW(60, "Error: %s : can't create ZSTD_DStream", strerror(errno)); CHECK( ZSTD_DCtx_setMaxWindowSize(ress.dctx, prefs->memLimit) ); ress.srcBufferSize = ZSTD_DStreamInSize(); ress.srcBuffer = malloc(ress.srcBufferSize); ress.dstBufferSize = ZSTD_DStreamOutSize(); ress.dstBuffer = malloc(ress.dstBufferSize); if (!ress.srcBuffer || !ress.dstBuffer) EXM_THROW(61, "Allocation error : not enough memory"); /* dictionary */ { void* dictBuffer; size_t const dictBufferSize = FIO_createDictBuffer(&dictBuffer, dictFileName); CHECK( ZSTD_initDStream_usingDict(ress.dctx, dictBuffer, dictBufferSize) ); free(dictBuffer); } return ress; } static void FIO_freeDResources(dRess_t ress) { CHECK( ZSTD_freeDStream(ress.dctx) ); free(ress.srcBuffer); free(ress.dstBuffer); } /** FIO_fwriteSparse() : * @return : storedSkips, to be provided to next call to FIO_fwriteSparse() of LZ4IO_fwriteSparseEnd() */ static unsigned FIO_fwriteSparse(FIO_prefs_t* const prefs, FILE* file, const void* buffer, size_t bufferSize, unsigned storedSkips) { const size_t* const bufferT = (const size_t*)buffer; /* Buffer is supposed malloc'ed, hence aligned on size_t */ size_t bufferSizeT = bufferSize / sizeof(size_t); const size_t* const bufferTEnd = bufferT + bufferSizeT; const size_t* ptrT = bufferT; static const size_t segmentSizeT = (32 KB) / sizeof(size_t); /* 0-test re-attempted every 32 KB */ if (!prefs->sparseFileSupport) { /* normal write */ size_t const sizeCheck = fwrite(buffer, 1, bufferSize, file); if (sizeCheck != bufferSize) EXM_THROW(70, "Write error : %s (cannot write decoded block)", strerror(errno)); return 0; } /* avoid int overflow */ if (storedSkips > 1 GB) { int const seekResult = LONG_SEEK(file, 1 GB, SEEK_CUR); if (seekResult != 0) EXM_THROW(71, "1 GB skip error (sparse file support)"); storedSkips -= 1 GB; } while (ptrT < bufferTEnd) { size_t seg0SizeT = segmentSizeT; size_t nb0T; /* count leading zeros */ if (seg0SizeT > bufferSizeT) seg0SizeT = bufferSizeT; bufferSizeT -= seg0SizeT; for (nb0T=0; (nb0T < seg0SizeT) && (ptrT[nb0T] == 0); nb0T++) ; storedSkips += (unsigned)(nb0T * sizeof(size_t)); if (nb0T != seg0SizeT) { /* not all 0s */ int const seekResult = LONG_SEEK(file, storedSkips, SEEK_CUR); if (seekResult) EXM_THROW(72, "Sparse skip error ; try --no-sparse"); storedSkips = 0; seg0SizeT -= nb0T; ptrT += nb0T; { size_t const sizeCheck = fwrite(ptrT, sizeof(size_t), seg0SizeT, file); if (sizeCheck != seg0SizeT) EXM_THROW(73, "Write error : cannot write decoded block"); } } ptrT += seg0SizeT; } { static size_t const maskT = sizeof(size_t)-1; if (bufferSize & maskT) { /* size not multiple of sizeof(size_t) : implies end of block */ const char* const restStart = (const char*)bufferTEnd; const char* restPtr = restStart; size_t restSize = bufferSize & maskT; const char* const restEnd = restStart + restSize; for ( ; (restPtr < restEnd) && (*restPtr == 0); restPtr++) ; storedSkips += (unsigned) (restPtr - restStart); if (restPtr != restEnd) { int seekResult = LONG_SEEK(file, storedSkips, SEEK_CUR); if (seekResult) EXM_THROW(74, "Sparse skip error ; try --no-sparse"); storedSkips = 0; { size_t const sizeCheck = fwrite(restPtr, 1, (size_t)(restEnd - restPtr), file); if (sizeCheck != (size_t)(restEnd - restPtr)) EXM_THROW(75, "Write error : cannot write decoded end of block"); } } } } return storedSkips; } static void FIO_fwriteSparseEnd(FIO_prefs_t* const prefs, FILE* file, unsigned storedSkips) { if (storedSkips>0) { assert(prefs->sparseFileSupport > 0); /* storedSkips>0 implies sparse support is enabled */ (void)prefs; /* assert can be disabled, in which case prefs becomes unused */ if (LONG_SEEK(file, storedSkips-1, SEEK_CUR) != 0) EXM_THROW(69, "Final skip error (sparse file support)"); /* last zero must be explicitly written, * so that skipped ones get implicitly translated as zero by FS */ { const char lastZeroByte[1] = { 0 }; if (fwrite(lastZeroByte, 1, 1, file) != 1) EXM_THROW(69, "Write error : cannot write last zero"); } } } /** FIO_passThrough() : just copy input into output, for compatibility with gzip -df mode @return : 0 (no error) */ static int FIO_passThrough(FIO_prefs_t* const prefs, FILE* foutput, FILE* finput, void* buffer, size_t bufferSize, size_t alreadyLoaded) { size_t const blockSize = MIN(64 KB, bufferSize); size_t readFromInput = 1; unsigned storedSkips = 0; /* assumption : ress->srcBufferLoaded bytes already loaded and stored within buffer */ { size_t const sizeCheck = fwrite(buffer, 1, alreadyLoaded, foutput); if (sizeCheck != alreadyLoaded) { DISPLAYLEVEL(1, "Pass-through write error \n"); return 1; } } while (readFromInput) { readFromInput = fread(buffer, 1, blockSize, finput); storedSkips = FIO_fwriteSparse(prefs, foutput, buffer, readFromInput, storedSkips); } FIO_fwriteSparseEnd(prefs, foutput, storedSkips); return 0; } /* FIO_highbit64() : * gives position of highest bit. * note : only works for v > 0 ! */ static unsigned FIO_highbit64(unsigned long long v) { unsigned count = 0; assert(v != 0); v >>= 1; while (v) { v >>= 1; count++; } return count; } /* FIO_zstdErrorHelp() : * detailed error message when requested window size is too large */ static void FIO_zstdErrorHelp(FIO_prefs_t* const prefs, dRess_t* ress, size_t err, char const* srcFileName) { ZSTD_frameHeader header; /* Help message only for one specific error */ if (ZSTD_getErrorCode(err) != ZSTD_error_frameParameter_windowTooLarge) return; /* Try to decode the frame header */ err = ZSTD_getFrameHeader(&header, ress->srcBuffer, ress->srcBufferLoaded); if (err == 0) { unsigned long long const windowSize = header.windowSize; unsigned const windowLog = FIO_highbit64(windowSize) + ((windowSize & (windowSize - 1)) != 0); assert(prefs->memLimit > 0); DISPLAYLEVEL(1, "%s : Window size larger than maximum : %llu > %u\n", srcFileName, windowSize, prefs->memLimit); if (windowLog <= ZSTD_WINDOWLOG_MAX) { unsigned const windowMB = (unsigned)((windowSize >> 20) + ((windowSize & ((1 MB) - 1)) != 0)); assert(windowSize < (U64)(1ULL << 52)); /* ensure now overflow for windowMB */ DISPLAYLEVEL(1, "%s : Use --long=%u or --memory=%uMB\n", srcFileName, windowLog, windowMB); return; } } DISPLAYLEVEL(1, "%s : Window log larger than ZSTD_WINDOWLOG_MAX=%u; not supported\n", srcFileName, ZSTD_WINDOWLOG_MAX); } /** FIO_decompressFrame() : * @return : size of decoded zstd frame, or an error code */ #define FIO_ERROR_FRAME_DECODING ((unsigned long long)(-2)) static unsigned long long FIO_decompressZstdFrame( FIO_prefs_t* const prefs, dRess_t* ress, FILE* finput, const char* srcFileName, U64 alreadyDecoded) { U64 frameSize = 0; U32 storedSkips = 0; size_t const srcFileLength = strlen(srcFileName); if (srcFileLength>20) srcFileName += srcFileLength-20; /* display last 20 characters only */ ZSTD_resetDStream(ress->dctx); /* Header loading : ensures ZSTD_getFrameHeader() will succeed */ { size_t const toDecode = ZSTD_FRAMEHEADERSIZE_MAX; if (ress->srcBufferLoaded < toDecode) { size_t const toRead = toDecode - ress->srcBufferLoaded; void* const startPosition = (char*)ress->srcBuffer + ress->srcBufferLoaded; ress->srcBufferLoaded += fread(startPosition, 1, toRead, finput); } } /* Main decompression Loop */ while (1) { ZSTD_inBuffer inBuff = { ress->srcBuffer, ress->srcBufferLoaded, 0 }; ZSTD_outBuffer outBuff= { ress->dstBuffer, ress->dstBufferSize, 0 }; size_t const readSizeHint = ZSTD_decompressStream(ress->dctx, &outBuff, &inBuff); if (ZSTD_isError(readSizeHint)) { DISPLAYLEVEL(1, "%s : Decoding error (36) : %s \n", srcFileName, ZSTD_getErrorName(readSizeHint)); FIO_zstdErrorHelp(prefs, ress, readSizeHint, srcFileName); return FIO_ERROR_FRAME_DECODING; } /* Write block */ storedSkips = FIO_fwriteSparse(prefs, ress->dstFile, ress->dstBuffer, outBuff.pos, storedSkips); frameSize += outBuff.pos; DISPLAYUPDATE(2, "\r%-20.20s : %u MB... ", srcFileName, (unsigned)((alreadyDecoded+frameSize)>>20) ); if (inBuff.pos > 0) { memmove(ress->srcBuffer, (char*)ress->srcBuffer + inBuff.pos, inBuff.size - inBuff.pos); ress->srcBufferLoaded -= inBuff.pos; } if (readSizeHint == 0) break; /* end of frame */ if (inBuff.size != inBuff.pos) { DISPLAYLEVEL(1, "%s : Decoding error (37) : should consume entire input \n", srcFileName); return FIO_ERROR_FRAME_DECODING; } /* Fill input buffer */ { size_t const toDecode = MIN(readSizeHint, ress->srcBufferSize); /* support large skippable frames */ if (ress->srcBufferLoaded < toDecode) { size_t const toRead = toDecode - ress->srcBufferLoaded; /* > 0 */ void* const startPosition = (char*)ress->srcBuffer + ress->srcBufferLoaded; size_t const readSize = fread(startPosition, 1, toRead, finput); if (readSize==0) { DISPLAYLEVEL(1, "%s : Read error (39) : premature end \n", srcFileName); return FIO_ERROR_FRAME_DECODING; } ress->srcBufferLoaded += readSize; } } } FIO_fwriteSparseEnd(prefs, ress->dstFile, storedSkips); return frameSize; } #ifdef ZSTD_GZDECOMPRESS static unsigned long long FIO_decompressGzFrame(dRess_t* ress, FILE* srcFile, const char* srcFileName) { unsigned long long outFileSize = 0; z_stream strm; int flush = Z_NO_FLUSH; int decodingError = 0; strm.zalloc = Z_NULL; strm.zfree = Z_NULL; strm.opaque = Z_NULL; strm.next_in = 0; strm.avail_in = 0; /* see http://www.zlib.net/manual.html */ if (inflateInit2(&strm, 15 /* maxWindowLogSize */ + 16 /* gzip only */) != Z_OK) return FIO_ERROR_FRAME_DECODING; strm.next_out = (Bytef*)ress->dstBuffer; strm.avail_out = (uInt)ress->dstBufferSize; strm.avail_in = (uInt)ress->srcBufferLoaded; strm.next_in = (z_const unsigned char*)ress->srcBuffer; for ( ; ; ) { int ret; if (strm.avail_in == 0) { ress->srcBufferLoaded = fread(ress->srcBuffer, 1, ress->srcBufferSize, srcFile); if (ress->srcBufferLoaded == 0) flush = Z_FINISH; strm.next_in = (z_const unsigned char*)ress->srcBuffer; strm.avail_in = (uInt)ress->srcBufferLoaded; } ret = inflate(&strm, flush); if (ret == Z_BUF_ERROR) { DISPLAYLEVEL(1, "zstd: %s: premature gz end \n", srcFileName); decodingError = 1; break; } if (ret != Z_OK && ret != Z_STREAM_END) { DISPLAYLEVEL(1, "zstd: %s: inflate error %d \n", srcFileName, ret); decodingError = 1; break; } { size_t const decompBytes = ress->dstBufferSize - strm.avail_out; if (decompBytes) { if (fwrite(ress->dstBuffer, 1, decompBytes, ress->dstFile) != decompBytes) { DISPLAYLEVEL(1, "zstd: %s \n", strerror(errno)); decodingError = 1; break; } outFileSize += decompBytes; strm.next_out = (Bytef*)ress->dstBuffer; strm.avail_out = (uInt)ress->dstBufferSize; } } if (ret == Z_STREAM_END) break; } if (strm.avail_in > 0) memmove(ress->srcBuffer, strm.next_in, strm.avail_in); ress->srcBufferLoaded = strm.avail_in; if ( (inflateEnd(&strm) != Z_OK) /* release resources ; error detected */ && (decodingError==0) ) { DISPLAYLEVEL(1, "zstd: %s: inflateEnd error \n", srcFileName); decodingError = 1; } return decodingError ? FIO_ERROR_FRAME_DECODING : outFileSize; } #endif #ifdef ZSTD_LZMADECOMPRESS static unsigned long long FIO_decompressLzmaFrame(dRess_t* ress, FILE* srcFile, const char* srcFileName, int plain_lzma) { unsigned long long outFileSize = 0; lzma_stream strm = LZMA_STREAM_INIT; lzma_action action = LZMA_RUN; lzma_ret initRet; int decodingError = 0; strm.next_in = 0; strm.avail_in = 0; if (plain_lzma) { initRet = lzma_alone_decoder(&strm, UINT64_MAX); /* LZMA */ } else { initRet = lzma_stream_decoder(&strm, UINT64_MAX, 0); /* XZ */ } if (initRet != LZMA_OK) { DISPLAYLEVEL(1, "zstd: %s: %s error %d \n", plain_lzma ? "lzma_alone_decoder" : "lzma_stream_decoder", srcFileName, initRet); return FIO_ERROR_FRAME_DECODING; } strm.next_out = (BYTE*)ress->dstBuffer; strm.avail_out = ress->dstBufferSize; strm.next_in = (BYTE const*)ress->srcBuffer; strm.avail_in = ress->srcBufferLoaded; for ( ; ; ) { lzma_ret ret; if (strm.avail_in == 0) { ress->srcBufferLoaded = fread(ress->srcBuffer, 1, ress->srcBufferSize, srcFile); if (ress->srcBufferLoaded == 0) action = LZMA_FINISH; strm.next_in = (BYTE const*)ress->srcBuffer; strm.avail_in = ress->srcBufferLoaded; } ret = lzma_code(&strm, action); if (ret == LZMA_BUF_ERROR) { DISPLAYLEVEL(1, "zstd: %s: premature lzma end \n", srcFileName); decodingError = 1; break; } if (ret != LZMA_OK && ret != LZMA_STREAM_END) { DISPLAYLEVEL(1, "zstd: %s: lzma_code decoding error %d \n", srcFileName, ret); decodingError = 1; break; } { size_t const decompBytes = ress->dstBufferSize - strm.avail_out; if (decompBytes) { if (fwrite(ress->dstBuffer, 1, decompBytes, ress->dstFile) != decompBytes) { DISPLAYLEVEL(1, "zstd: %s \n", strerror(errno)); decodingError = 1; break; } outFileSize += decompBytes; strm.next_out = (BYTE*)ress->dstBuffer; strm.avail_out = ress->dstBufferSize; } } if (ret == LZMA_STREAM_END) break; } if (strm.avail_in > 0) memmove(ress->srcBuffer, strm.next_in, strm.avail_in); ress->srcBufferLoaded = strm.avail_in; lzma_end(&strm); return decodingError ? FIO_ERROR_FRAME_DECODING : outFileSize; } #endif #ifdef ZSTD_LZ4DECOMPRESS static unsigned long long FIO_decompressLz4Frame(dRess_t* ress, FILE* srcFile, const char* srcFileName) { unsigned long long filesize = 0; LZ4F_errorCode_t nextToLoad; LZ4F_decompressionContext_t dCtx; LZ4F_errorCode_t const errorCode = LZ4F_createDecompressionContext(&dCtx, LZ4F_VERSION); int decodingError = 0; if (LZ4F_isError(errorCode)) { DISPLAYLEVEL(1, "zstd: failed to create lz4 decompression context \n"); return FIO_ERROR_FRAME_DECODING; } /* Init feed with magic number (already consumed from FILE* sFile) */ { size_t inSize = 4; size_t outSize= 0; MEM_writeLE32(ress->srcBuffer, LZ4_MAGICNUMBER); nextToLoad = LZ4F_decompress(dCtx, ress->dstBuffer, &outSize, ress->srcBuffer, &inSize, NULL); if (LZ4F_isError(nextToLoad)) { DISPLAYLEVEL(1, "zstd: %s: lz4 header error : %s \n", srcFileName, LZ4F_getErrorName(nextToLoad)); LZ4F_freeDecompressionContext(dCtx); return FIO_ERROR_FRAME_DECODING; } } /* Main Loop */ for (;nextToLoad;) { size_t readSize; size_t pos = 0; size_t decodedBytes = ress->dstBufferSize; /* Read input */ if (nextToLoad > ress->srcBufferSize) nextToLoad = ress->srcBufferSize; readSize = fread(ress->srcBuffer, 1, nextToLoad, srcFile); if (!readSize) break; /* reached end of file or stream */ while ((pos < readSize) || (decodedBytes == ress->dstBufferSize)) { /* still to read, or still to flush */ /* Decode Input (at least partially) */ size_t remaining = readSize - pos; decodedBytes = ress->dstBufferSize; nextToLoad = LZ4F_decompress(dCtx, ress->dstBuffer, &decodedBytes, (char*)(ress->srcBuffer)+pos, &remaining, NULL); if (LZ4F_isError(nextToLoad)) { DISPLAYLEVEL(1, "zstd: %s: lz4 decompression error : %s \n", srcFileName, LZ4F_getErrorName(nextToLoad)); decodingError = 1; nextToLoad = 0; break; } pos += remaining; /* Write Block */ if (decodedBytes) { if (fwrite(ress->dstBuffer, 1, decodedBytes, ress->dstFile) != decodedBytes) { DISPLAYLEVEL(1, "zstd: %s \n", strerror(errno)); decodingError = 1; nextToLoad = 0; break; } filesize += decodedBytes; DISPLAYUPDATE(2, "\rDecompressed : %u MB ", (unsigned)(filesize>>20)); } if (!nextToLoad) break; } } /* can be out because readSize == 0, which could be an fread() error */ if (ferror(srcFile)) { DISPLAYLEVEL(1, "zstd: %s: read error \n", srcFileName); decodingError=1; } if (nextToLoad!=0) { DISPLAYLEVEL(1, "zstd: %s: unfinished lz4 stream \n", srcFileName); decodingError=1; } LZ4F_freeDecompressionContext(dCtx); ress->srcBufferLoaded = 0; /* LZ4F will reach exact frame boundary */ return decodingError ? FIO_ERROR_FRAME_DECODING : filesize; } #endif /** FIO_decompressFrames() : * Find and decode frames inside srcFile * srcFile presumed opened and valid * @return : 0 : OK * 1 : error */ static int FIO_decompressFrames(FIO_prefs_t* const prefs, dRess_t ress, FILE* srcFile, const char* dstFileName, const char* srcFileName) { unsigned readSomething = 0; unsigned long long filesize = 0; assert(srcFile != NULL); /* for each frame */ for ( ; ; ) { /* check magic number -> version */ size_t const toRead = 4; const BYTE* const buf = (const BYTE*)ress.srcBuffer; if (ress.srcBufferLoaded < toRead) /* load up to 4 bytes for header */ ress.srcBufferLoaded += fread((char*)ress.srcBuffer + ress.srcBufferLoaded, (size_t)1, toRead - ress.srcBufferLoaded, srcFile); if (ress.srcBufferLoaded==0) { if (readSomething==0) { /* srcFile is empty (which is invalid) */ DISPLAYLEVEL(1, "zstd: %s: unexpected end of file \n", srcFileName); return 1; } /* else, just reached frame boundary */ break; /* no more input */ } readSomething = 1; /* there is at least 1 byte in srcFile */ if (ress.srcBufferLoaded < toRead) { DISPLAYLEVEL(1, "zstd: %s: unknown header \n", srcFileName); return 1; } if (ZSTD_isFrame(buf, ress.srcBufferLoaded)) { unsigned long long const frameSize = FIO_decompressZstdFrame(prefs, &ress, srcFile, srcFileName, filesize); if (frameSize == FIO_ERROR_FRAME_DECODING) return 1; filesize += frameSize; } else if (buf[0] == 31 && buf[1] == 139) { /* gz magic number */ #ifdef ZSTD_GZDECOMPRESS unsigned long long const frameSize = FIO_decompressGzFrame(&ress, srcFile, srcFileName); if (frameSize == FIO_ERROR_FRAME_DECODING) return 1; filesize += frameSize; #else DISPLAYLEVEL(1, "zstd: %s: gzip file cannot be uncompressed (zstd compiled without HAVE_ZLIB) -- ignored \n", srcFileName); return 1; #endif } else if ((buf[0] == 0xFD && buf[1] == 0x37) /* xz magic number */ || (buf[0] == 0x5D && buf[1] == 0x00)) { /* lzma header (no magic number) */ #ifdef ZSTD_LZMADECOMPRESS unsigned long long const frameSize = FIO_decompressLzmaFrame(&ress, srcFile, srcFileName, buf[0] != 0xFD); if (frameSize == FIO_ERROR_FRAME_DECODING) return 1; filesize += frameSize; #else DISPLAYLEVEL(1, "zstd: %s: xz/lzma file cannot be uncompressed (zstd compiled without HAVE_LZMA) -- ignored \n", srcFileName); return 1; #endif } else if (MEM_readLE32(buf) == LZ4_MAGICNUMBER) { #ifdef ZSTD_LZ4DECOMPRESS unsigned long long const frameSize = FIO_decompressLz4Frame(&ress, srcFile, srcFileName); if (frameSize == FIO_ERROR_FRAME_DECODING) return 1; filesize += frameSize; #else DISPLAYLEVEL(1, "zstd: %s: lz4 file cannot be uncompressed (zstd compiled without HAVE_LZ4) -- ignored \n", srcFileName); return 1; #endif } else if ((prefs->overwrite) && !strcmp (dstFileName, stdoutmark)) { /* pass-through mode */ return FIO_passThrough(prefs, ress.dstFile, srcFile, ress.srcBuffer, ress.srcBufferSize, ress.srcBufferLoaded); } else { DISPLAYLEVEL(1, "zstd: %s: unsupported format \n", srcFileName); return 1; } } /* for each frame */ /* Final Status */ DISPLAYLEVEL(2, "\r%79s\r", ""); DISPLAYLEVEL(2, "%-20s: %llu bytes \n", srcFileName, filesize); return 0; } /** FIO_decompressDstFile() : open `dstFileName`, or path-through if ress.dstFile is already != 0, then start decompression process (FIO_decompressFrames()). @return : 0 : OK 1 : operation aborted */ static int FIO_decompressDstFile(FIO_prefs_t* const prefs, dRess_t ress, FILE* srcFile, const char* dstFileName, const char* srcFileName) { int result; stat_t statbuf; int transfer_permissions = 0; int releaseDstFile = 0; if (ress.dstFile == NULL) { releaseDstFile = 1; ress.dstFile = FIO_openDstFile(prefs, srcFileName, dstFileName); if (ress.dstFile==0) return 1; /* Must only be added after FIO_openDstFile() succeeds. * Otherwise we may delete the destination file if it already exists, * and the user presses Ctrl-C when asked if they wish to overwrite. */ addHandler(dstFileName); if ( strcmp(srcFileName, stdinmark) /* special case : don't transfer permissions from stdin */ && UTIL_getFileStat(srcFileName, &statbuf) ) transfer_permissions = 1; } result = FIO_decompressFrames(prefs, ress, srcFile, dstFileName, srcFileName); if (releaseDstFile) { FILE* const dstFile = ress.dstFile; clearHandler(); ress.dstFile = NULL; if (fclose(dstFile)) { DISPLAYLEVEL(1, "zstd: %s: %s \n", dstFileName, strerror(errno)); result = 1; } if ( (result != 0) /* operation failure */ && strcmp(dstFileName, nulmark) /* special case : don't remove() /dev/null (#316) */ && strcmp(dstFileName, stdoutmark) /* special case : don't remove() stdout */ ) { FIO_remove(dstFileName); /* remove decompression artefact; note: don't do anything special if remove() fails */ } else { /* operation success */ if ( strcmp(dstFileName, stdoutmark) /* special case : don't chmod stdout */ && strcmp(dstFileName, nulmark) /* special case : don't chmod /dev/null */ && transfer_permissions ) /* file permissions correctly extracted from src */ UTIL_setFileStat(dstFileName, &statbuf); /* transfer file permissions from src into dst */ } } return result; } /** FIO_decompressSrcFile() : Open `srcFileName`, transfer control to decompressDstFile() @return : 0 : OK 1 : error */ static int FIO_decompressSrcFile(FIO_prefs_t* const prefs, dRess_t ress, const char* dstFileName, const char* srcFileName) { FILE* srcFile; int result; if (UTIL_isDirectory(srcFileName)) { DISPLAYLEVEL(1, "zstd: %s is a directory -- ignored \n", srcFileName); return 1; } srcFile = FIO_openSrcFile(srcFileName); if (srcFile==NULL) return 1; ress.srcBufferLoaded = 0; result = FIO_decompressDstFile(prefs, ress, srcFile, dstFileName, srcFileName); /* Close file */ if (fclose(srcFile)) { DISPLAYLEVEL(1, "zstd: %s: %s \n", srcFileName, strerror(errno)); /* error should not happen */ return 1; } if ( prefs->removeSrcFile /* --rm */ && (result==0) /* decompression successful */ && strcmp(srcFileName, stdinmark) ) /* not stdin */ { /* We must clear the handler, since after this point calling it would * delete both the source and destination files. */ clearHandler(); if (FIO_remove(srcFileName)) { /* failed to remove src file */ DISPLAYLEVEL(1, "zstd: %s: %s \n", srcFileName, strerror(errno)); return 1; } } return result; } int FIO_decompressFilename(FIO_prefs_t* const prefs, const char* dstFileName, const char* srcFileName, const char* dictFileName) { dRess_t const ress = FIO_createDResources(prefs, dictFileName); int const decodingError = FIO_decompressSrcFile(prefs, ress, dstFileName, srcFileName); FIO_freeDResources(ress); return decodingError; } /* FIO_determineDstName() : * create a destination filename from a srcFileName. * @return a pointer to it. * @return == NULL if there is an error */ static const char* FIO_determineDstName(const char* srcFileName) { static size_t dfnbCapacity = 0; static char* dstFileNameBuffer = NULL; /* using static allocation : this function cannot be multi-threaded */ size_t const sfnSize = strlen(srcFileName); size_t suffixSize; const char* const suffixPtr = strrchr(srcFileName, '.'); if (suffixPtr == NULL) { DISPLAYLEVEL(1, "zstd: %s: unknown suffix -- ignored \n", srcFileName); return NULL; } suffixSize = strlen(suffixPtr); /* check suffix is authorized */ if (sfnSize <= suffixSize || ( strcmp(suffixPtr, ZSTD_EXTENSION) #ifdef ZSTD_GZDECOMPRESS && strcmp(suffixPtr, GZ_EXTENSION) #endif #ifdef ZSTD_LZMADECOMPRESS && strcmp(suffixPtr, XZ_EXTENSION) && strcmp(suffixPtr, LZMA_EXTENSION) #endif #ifdef ZSTD_LZ4DECOMPRESS && strcmp(suffixPtr, LZ4_EXTENSION) #endif ) ) { const char* suffixlist = ZSTD_EXTENSION #ifdef ZSTD_GZDECOMPRESS "/" GZ_EXTENSION #endif #ifdef ZSTD_LZMADECOMPRESS "/" XZ_EXTENSION "/" LZMA_EXTENSION #endif #ifdef ZSTD_LZ4DECOMPRESS "/" LZ4_EXTENSION #endif ; DISPLAYLEVEL(1, "zstd: %s: unknown suffix (%s expected) -- ignored \n", srcFileName, suffixlist); return NULL; } /* allocate enough space to write dstFilename into it */ if (dfnbCapacity+suffixSize <= sfnSize+1) { free(dstFileNameBuffer); dfnbCapacity = sfnSize + 20; dstFileNameBuffer = (char*)malloc(dfnbCapacity); if (dstFileNameBuffer==NULL) EXM_THROW(74, "%s : not enough memory for dstFileName", strerror(errno)); } /* return dst name == src name truncated from suffix */ assert(dstFileNameBuffer != NULL); memcpy(dstFileNameBuffer, srcFileName, sfnSize - suffixSize); dstFileNameBuffer[sfnSize-suffixSize] = '\0'; return dstFileNameBuffer; /* note : dstFileNameBuffer memory is not going to be free */ } int FIO_decompressMultipleFilenames(FIO_prefs_t* const prefs, const char* srcNamesTable[], unsigned nbFiles, const char* outFileName, const char* dictFileName) { int error = 0; dRess_t ress = FIO_createDResources(prefs, dictFileName); if (outFileName) { unsigned u; ress.dstFile = FIO_openDstFile(prefs, NULL, outFileName); if (ress.dstFile == 0) EXM_THROW(71, "cannot open %s", outFileName); for (u=0; u<nbFiles; u++) error |= FIO_decompressSrcFile(prefs, ress, outFileName, srcNamesTable[u]); if (fclose(ress.dstFile)) EXM_THROW(72, "Write error : %s : cannot properly close output file", strerror(errno)); } else { unsigned u; for (u=0; u<nbFiles; u++) { /* create dstFileName */ const char* const srcFileName = srcNamesTable[u]; const char* const dstFileName = FIO_determineDstName(srcFileName); if (dstFileName == NULL) { error=1; continue; } error |= FIO_decompressSrcFile(prefs, ress, dstFileName, srcFileName); } } FIO_freeDResources(ress); return error; } /* ************************************************************************** * .zst file info (--list command) ***************************************************************************/ typedef struct { U64 decompressedSize; U64 compressedSize; U64 windowSize; int numActualFrames; int numSkippableFrames; int decompUnavailable; int usesCheck; U32 nbFiles; } fileInfo_t; typedef enum { info_success=0, info_frame_error=1, info_not_zstd=2, info_file_error=3, info_truncated_input=4, } InfoError; #define ERROR_IF(c,n,...) { \ if (c) { \ DISPLAYLEVEL(1, __VA_ARGS__); \ DISPLAYLEVEL(1, " \n"); \ return n; \ } \ } static InfoError FIO_analyzeFrames(fileInfo_t* info, FILE* const srcFile) { /* begin analyzing frame */ for ( ; ; ) { BYTE headerBuffer[ZSTD_FRAMEHEADERSIZE_MAX]; size_t const numBytesRead = fread(headerBuffer, 1, sizeof(headerBuffer), srcFile); if (numBytesRead < ZSTD_FRAMEHEADERSIZE_MIN) { if ( feof(srcFile) && (numBytesRead == 0) && (info->compressedSize > 0) && (info->compressedSize != UTIL_FILESIZE_UNKNOWN) ) { unsigned long long file_position = (unsigned long long) LONG_TELL(srcFile); unsigned long long file_size = (unsigned long long) info->compressedSize; ERROR_IF(file_position != file_size, info_truncated_input, "Error: seeked to position %llu, which is beyond file size of %llu\n", file_position, file_size); break; /* correct end of file => success */ } ERROR_IF(feof(srcFile), info_not_zstd, "Error: reached end of file with incomplete frame"); ERROR_IF(1, info_frame_error, "Error: did not reach end of file but ran out of frames"); } { U32 const magicNumber = MEM_readLE32(headerBuffer); /* Zstandard frame */ if (magicNumber == ZSTD_MAGICNUMBER) { ZSTD_frameHeader header; U64 const frameContentSize = ZSTD_getFrameContentSize(headerBuffer, numBytesRead); if ( frameContentSize == ZSTD_CONTENTSIZE_ERROR || frameContentSize == ZSTD_CONTENTSIZE_UNKNOWN ) { info->decompUnavailable = 1; } else { info->decompressedSize += frameContentSize; } ERROR_IF(ZSTD_getFrameHeader(&header, headerBuffer, numBytesRead) != 0, info_frame_error, "Error: could not decode frame header"); info->windowSize = header.windowSize; /* move to the end of the frame header */ { size_t const headerSize = ZSTD_frameHeaderSize(headerBuffer, numBytesRead); ERROR_IF(ZSTD_isError(headerSize), info_frame_error, "Error: could not determine frame header size"); ERROR_IF(fseek(srcFile, ((long)headerSize)-((long)numBytesRead), SEEK_CUR) != 0, info_frame_error, "Error: could not move to end of frame header"); } /* skip all blocks in the frame */ { int lastBlock = 0; do { BYTE blockHeaderBuffer[3]; ERROR_IF(fread(blockHeaderBuffer, 1, 3, srcFile) != 3, info_frame_error, "Error while reading block header"); { U32 const blockHeader = MEM_readLE24(blockHeaderBuffer); U32 const blockTypeID = (blockHeader >> 1) & 3; U32 const isRLE = (blockTypeID == 1); U32 const isWrongBlock = (blockTypeID == 3); long const blockSize = isRLE ? 1 : (long)(blockHeader >> 3); ERROR_IF(isWrongBlock, info_frame_error, "Error: unsupported block type"); lastBlock = blockHeader & 1; ERROR_IF(fseek(srcFile, blockSize, SEEK_CUR) != 0, info_frame_error, "Error: could not skip to end of block"); } } while (lastBlock != 1); } /* check if checksum is used */ { BYTE const frameHeaderDescriptor = headerBuffer[4]; int const contentChecksumFlag = (frameHeaderDescriptor & (1 << 2)) >> 2; if (contentChecksumFlag) { info->usesCheck = 1; ERROR_IF(fseek(srcFile, 4, SEEK_CUR) != 0, info_frame_error, "Error: could not skip past checksum"); } } info->numActualFrames++; } /* Skippable frame */ else if ((magicNumber & ZSTD_MAGIC_SKIPPABLE_MASK) == ZSTD_MAGIC_SKIPPABLE_START) { U32 const frameSize = MEM_readLE32(headerBuffer + 4); long const seek = (long)(8 + frameSize - numBytesRead); ERROR_IF(LONG_SEEK(srcFile, seek, SEEK_CUR) != 0, info_frame_error, "Error: could not find end of skippable frame"); info->numSkippableFrames++; } /* unknown content */ else { return info_not_zstd; } } /* magic number analysis */ } /* end analyzing frames */ return info_success; } static InfoError getFileInfo_fileConfirmed(fileInfo_t* info, const char* inFileName) { InfoError status; FILE* const srcFile = FIO_openSrcFile(inFileName); ERROR_IF(srcFile == NULL, info_file_error, "Error: could not open source file %s", inFileName); info->compressedSize = UTIL_getFileSize(inFileName); status = FIO_analyzeFrames(info, srcFile); fclose(srcFile); info->nbFiles = 1; return status; } /** getFileInfo() : * Reads information from file, stores in *info * @return : InfoError status */ static InfoError getFileInfo(fileInfo_t* info, const char* srcFileName) { ERROR_IF(!UTIL_isRegularFile(srcFileName), info_file_error, "Error : %s is not a file", srcFileName); return getFileInfo_fileConfirmed(info, srcFileName); } static void displayInfo(const char* inFileName, const fileInfo_t* info, int displayLevel) { unsigned const unit = info->compressedSize < (1 MB) ? (1 KB) : (1 MB); const char* const unitStr = info->compressedSize < (1 MB) ? "KB" : "MB"; double const windowSizeUnit = (double)info->windowSize / unit; double const compressedSizeUnit = (double)info->compressedSize / unit; double const decompressedSizeUnit = (double)info->decompressedSize / unit; double const ratio = (info->compressedSize == 0) ? 0 : ((double)info->decompressedSize)/info->compressedSize; const char* const checkString = (info->usesCheck ? "XXH64" : "None"); if (displayLevel <= 2) { if (!info->decompUnavailable) { DISPLAYOUT("%6d %5d %7.2f %2s %9.2f %2s %5.3f %5s %s\n", info->numSkippableFrames + info->numActualFrames, info->numSkippableFrames, compressedSizeUnit, unitStr, decompressedSizeUnit, unitStr, ratio, checkString, inFileName); } else { DISPLAYOUT("%6d %5d %7.2f %2s %5s %s\n", info->numSkippableFrames + info->numActualFrames, info->numSkippableFrames, compressedSizeUnit, unitStr, checkString, inFileName); } } else { DISPLAYOUT("%s \n", inFileName); DISPLAYOUT("# Zstandard Frames: %d\n", info->numActualFrames); if (info->numSkippableFrames) DISPLAYOUT("# Skippable Frames: %d\n", info->numSkippableFrames); DISPLAYOUT("Window Size: %.2f %2s (%llu B)\n", windowSizeUnit, unitStr, (unsigned long long)info->windowSize); DISPLAYOUT("Compressed Size: %.2f %2s (%llu B)\n", compressedSizeUnit, unitStr, (unsigned long long)info->compressedSize); if (!info->decompUnavailable) { DISPLAYOUT("Decompressed Size: %.2f %2s (%llu B)\n", decompressedSizeUnit, unitStr, (unsigned long long)info->decompressedSize); DISPLAYOUT("Ratio: %.4f\n", ratio); } DISPLAYOUT("Check: %s\n", checkString); DISPLAYOUT("\n"); } } static fileInfo_t FIO_addFInfo(fileInfo_t fi1, fileInfo_t fi2) { fileInfo_t total; memset(&total, 0, sizeof(total)); total.numActualFrames = fi1.numActualFrames + fi2.numActualFrames; total.numSkippableFrames = fi1.numSkippableFrames + fi2.numSkippableFrames; total.compressedSize = fi1.compressedSize + fi2.compressedSize; total.decompressedSize = fi1.decompressedSize + fi2.decompressedSize; total.decompUnavailable = fi1.decompUnavailable | fi2.decompUnavailable; total.usesCheck = fi1.usesCheck & fi2.usesCheck; total.nbFiles = fi1.nbFiles + fi2.nbFiles; return total; } static int FIO_listFile(fileInfo_t* total, const char* inFileName, int displayLevel) { fileInfo_t info; memset(&info, 0, sizeof(info)); { InfoError const error = getFileInfo(&info, inFileName); switch (error) { case info_frame_error: /* display error, but provide output */ DISPLAYLEVEL(1, "Error while parsing \"%s\" \n", inFileName); break; case info_not_zstd: DISPLAYOUT("File \"%s\" not compressed by zstd \n", inFileName); if (displayLevel > 2) DISPLAYOUT("\n"); return 1; case info_file_error: /* error occurred while opening the file */ if (displayLevel > 2) DISPLAYOUT("\n"); return 1; case info_truncated_input: DISPLAYOUT("File \"%s\" is truncated \n", inFileName); if (displayLevel > 2) DISPLAYOUT("\n"); return 1; case info_success: default: break; } displayInfo(inFileName, &info, displayLevel); *total = FIO_addFInfo(*total, info); assert(error == info_success || error == info_frame_error); return error; } } int FIO_listMultipleFiles(unsigned numFiles, const char** filenameTable, int displayLevel) { /* ensure no specified input is stdin (needs fseek() capability) */ { unsigned u; for (u=0; u<numFiles;u++) { ERROR_IF(!strcmp (filenameTable[u], stdinmark), 1, "zstd: --list does not support reading from standard input"); } } if (numFiles == 0) { if (!IS_CONSOLE(stdin)) { DISPLAYLEVEL(1, "zstd: --list does not support reading from standard input \n"); } DISPLAYLEVEL(1, "No files given \n"); return 1; } if (displayLevel <= 2) { DISPLAYOUT("Frames Skips Compressed Uncompressed Ratio Check Filename\n"); } { int error = 0; fileInfo_t total; memset(&total, 0, sizeof(total)); total.usesCheck = 1; /* --list each file, and check for any error */ { unsigned u; for (u=0; u<numFiles;u++) { error |= FIO_listFile(&total, filenameTable[u], displayLevel); } } if (numFiles > 1 && displayLevel <= 2) { /* display total */ unsigned const unit = total.compressedSize < (1 MB) ? (1 KB) : (1 MB); const char* const unitStr = total.compressedSize < (1 MB) ? "KB" : "MB"; double const compressedSizeUnit = (double)total.compressedSize / unit; double const decompressedSizeUnit = (double)total.decompressedSize / unit; double const ratio = (total.compressedSize == 0) ? 0 : ((double)total.decompressedSize)/total.compressedSize; const char* const checkString = (total.usesCheck ? "XXH64" : ""); DISPLAYOUT("----------------------------------------------------------------- \n"); if (total.decompUnavailable) { DISPLAYOUT("%6d %5d %7.2f %2s %5s %u files\n", total.numSkippableFrames + total.numActualFrames, total.numSkippableFrames, compressedSizeUnit, unitStr, checkString, (unsigned)total.nbFiles); } else { DISPLAYOUT("%6d %5d %7.2f %2s %9.2f %2s %5.3f %5s %u files\n", total.numSkippableFrames + total.numActualFrames, total.numSkippableFrames, compressedSizeUnit, unitStr, decompressedSizeUnit, unitStr, ratio, checkString, (unsigned)total.nbFiles); } } return error; } } #endif /* #ifndef ZSTD_NODECOMPRESS */